set default value for AFC group fields

/**
 * Set default valut for Custom Primary Category Fields.
 */
function set_default_primary_category( $value, $post_id, $field ) {
    if ( empty( $value ) ) {
        $jnews_primary_category = get_post_meta( $post_id, 'jnews_primary_category', true );
        if ( is_array( $jnews_primary_category ) && isset( $jnews_primary_category['id'] ) ) {
            $value = $jnews_primary_category['id'];
        }
    }
    return $value;
}

/**
 * Set default valut for Custom Hide Category Fields.
 */
function set_default_hide_category( $value, $post_id, $field ) {
    if ( empty( $value ) ) {
        $jnews_primary_category = get_post_meta( $post_id, 'jnews_primary_category', true );
        if ( is_array( $jnews_primary_category ) && isset( $jnews_primary_category['hide'] ) ) {
            $value = explode( ',', $jnews_primary_category['hide'] );
        }
    }
    return $value;
}

add_filter( 'acf/load_value/name=custom_primary_category', 'set_default_primary_category', 10, 3 );
add_filter( 'acf/load_value/name=custom_hide_category', 'set_default_hide_category', 10, 3 );